Severance (Tables)

12 Months Ended

Dec. 31, 2017

Restructuring Cost and Reserve [Line Items]

Schedule of Severance Expense

The following table presents the direct and allocated severance and related expenses recorded by the Duke Energy Registrants. Amounts are included within Operation, maintenance and other on the Consolidated Statements of Operations.

			Duke				Duke		Duke		Duke		Duke
	Duke		Energy		Progress		Energy		Energy		Energy		Energy
(in millions)	Energy		Carolinas		Energy		Progress		Florida		Ohio		Indiana		Piedmont(a)
Year Ended December 31, 2017	$	15	$	2	$	2	$	1	$	1	$	—	$	1	$	9
Year Ended December 31, 2016	118		39		40		23		17		3		7
Year Ended December 31, 2015	142		93		36		28		8		2		6

(a) Piedmont severance benefit costs were $3 million for the two months ended December 31, 2016, and $19 million for the year ended October 31, 2016. Piedmont did not record any severance benefit costs for the year ended October 31, 2015.

Schedule of Severance Liability

The table below presents the severance liability for past and ongoing severance plans including the plans described above. Amounts for Duke Energy Indiana and Duke Energy Ohio are not material.

				Duke						Duke			Duke
	Duke			Energy			Progress			Energy			Energy
(in millions)	Energy			Carolinas			Energy			Progress			Florida			Piedmont
Balance at December 31, 2016	$	79		$	13		$	14		$	6		$	8		$	20
Provision/Adjustments	17			2			—			—			—			9
Cash Reductions	(77		)	(10		)	(12		)	(5		)	(8		)	(24		)
Balance at December 31, 2017	$	19		$	5		$	2		$	1		$	—		$	5